util/util.h

// Copyright 2009 The RE2 Authors.  All Rights Reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#ifndef UTIL_UTIL_H_
#define UTIL_UTIL_H_

// TODO(junyer): Get rid of this.
#include <string>
using std::string;

#ifdef _WIN32

#define snprintf _snprintf_s
#define stricmp _stricmp
#define strtof strtod /* not really correct but best we can do */
#define strtoll _strtoi64
#define strtoull _strtoui64
#define vsnprintf vsnprintf_s

#pragma warning(disable: 4200) // zero-sized array

#endif

namespace re2 {

typedef int8_t int8;
typedef uint8_t uint8;
typedef int16_t int16;
typedef uint16_t uint16;
typedef int32_t int32;
typedef uint32_t uint32;
typedef int64_t int64;
typedef uint64_t uint64;

typedef unsigned int uint;

// Prevent the compiler from complaining about or optimizing away variables
// that appear unused.
#undef ATTRIBUTE_UNUSED
#if defined(__GNUC__)
#define ATTRIBUTE_UNUSED __attribute__ ((unused))
#else
#define ATTRIBUTE_UNUSED
#endif

// COMPILE_ASSERT causes a compile error about msg if expr is not true.
#if __cplusplus >= 201103L
#define COMPILE_ASSERT(expr, msg) static_assert(expr, #msg)
#else
template<bool> struct CompileAssert {};
#define COMPILE_ASSERT(expr, msg) \
  typedef CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1] ATTRIBUTE_UNUSED
#endif

// DISALLOW_COPY_AND_ASSIGN disallows the copy and operator= functions.
// It goes in the private: declarations in a class.
#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
  TypeName(const TypeName&);                 \
  void operator=(const TypeName&)

#define arraysize(array) (int)(sizeof(array)/sizeof((array)[0]))

#ifndef FALLTHROUGH_INTENDED
#define FALLTHROUGH_INTENDED do { } while (0)
#endif

#ifndef NO_THREAD_SAFETY_ANALYSIS
#define NO_THREAD_SAFETY_ANALYSIS
#endif

class StringPiece;

string CEscape(const StringPiece& src);
int CEscapeString(const char* src, int src_len, char* dest, int dest_len);

extern string StringPrintf(const char* format, ...);
extern void SStringPrintf(string* dst, const char* format, ...);
extern void StringAppendF(string* dst, const char* format, ...);
extern string PrefixSuccessor(const StringPiece& prefix);

uint32 hashword(const uint32*, size_t, uint32);
void hashword2(const uint32*, size_t, uint32*, uint32*);

static inline uint32 Hash32StringWithSeed(const char* s, int len, uint32 seed) {
  return hashword((uint32*)s, len/4, seed);
}

static inline uint64 Hash64StringWithSeed(const char* s, int len, uint32 seed) {
  uint32 x, y;
  x = seed;
  y = 0;
  hashword2((uint32*)s, len/4, &x, &y);
  return ((uint64)x << 32) | y;
}

bool RunningOnValgrind();

}  // namespace re2

#include "util/logging.h"
#include "util/mutex.h"
#include "util/utf.h"

#endif  // UTIL_UTIL_H_